Auto correction systems are a relevant external factor, in some typing contexts. For example, one (probably bad, but who's to say??) habit I've picked up recently is to cheese [0] the Googling of things - saving a massive zero.point.bugger_all seconds per time - by fat-fingering my search queries in a rush, without bothering to spell words correctly. What did Samuel L Jackson say, exactly? - why, "thta movei abotu bible speehc", of course - first result [1], done! None of this pesky 'stopping to think about what order the letters go in' business!

[0] https://www.urbandictionary.com/define.php?term=cheese%20str...

[1] https://www.google.com/search?q=thta+movei+abotu+bible+speeh...